Longitudinal beam



FIG. 1 is a partial side view of a longitudinal beam;

FIG. 2 is a cross-sectional view thereof cut along line 1-1 of FIG. 1;

FIG. 3 is a perspective view of the section of the longitudinal beam shown in FIG. 1;

FIG. 4 is another perspective view of a section of the longitudinal beam shown in FIG. 1;

FIG. 5 is a zoomed-in view of a portion of the longitudinal beam shown in FIG. 1, which illustrates claimed portions at intersections of helicals with longitudinal members; and,

FIG. 6 is a zoomed-in view of a portion of the longitudinal beam shown in FIG. 1, which illustrates claimed portions at intersections of helicals.

The broken lines illustrate portions of a longitudinal beam that form no part of the claimed design. The dot-dash lines illustrate boundaries that form no part of the claimed design. 

CLAIM What is claimed is an ornamental design for a longitudinal beam, as shown and described herein. 